/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */
package org.apache.shindig.social.core.util.atom;

import org.apache.shindig.social.opensocial.model.Activity;
import com.google.common.base.Preconditions;

/**
 * This represents atom:entry/atom:source for the Activity object.
 */
public class AtomSource {

  @SuppressWarnings("unused")
  private String title;
  @SuppressWarnings("unused")
  private AtomLink link;

  /**
   * @param activity
   */
  public AtomSource(Activity activity) {
    title = activity.getStreamTitle();
    link = new AtomLink("self", firstNonNull(activity.getStreamUrl(), "urn:bogus"));
  }

  private static <T> T firstNonNull(T first, T second) {
    return first != null ? first : Preconditions.checkNotNull(second);
  }
}
